Ocean Dragon Lord - Kairyu-Shin

While "Umi" is on the field, each player can only control 1 face-up non-WATER monster (if a player controls 2 or more face-up non-WATER monsters, that player sends those monsters to the GY until they control only 1). During your Main Phase: You can add 1 "Umi" or 1 "Kairyu-Shin" Spell/Trap or 1 "Sea Stealth" Spell/Trap from your Deck to your hand. You can only use this effect of "Ocean Dragon Lord - Kairyu-Shin" once per turn.